SIST EN IEC 60974-1:2023
(Main)Arc welding equipment - Part 1: Welding power sources (IEC 60974-1:2021)
Arc welding equipment - Part 1: Welding power sources (IEC 60974-1:2021)
This part of IEC 60974 is applicable to power sources for arc welding and allied processes designed for INDUSTRIAL AND PROFESSIONAL USE, and supplied by a voltage not exceeding 1 000 V, BATTERY supplied or driven by mechanical means.
This document specifies safety and performance requirements of WELDING POWER SOURCES and PLASMA CUTTING SYSTEMS.
This document is not applicable to limited duty arc welding and cutting power sources which are designed mainly for use by laymen and designed in accordance with IEC 60974-6.
This document includes requirements for battery-powered WELDING POWER SOURCES and BATTERY packs, which are given in Annex O.
This document is not applicable to testing of power sources during periodic maintenance or after repair.
NOTE 1 Typical allied processes are electric arc cutting and arc spraying.
NOTE 2 AC systems having a nominal voltage between 100 V and 1 000 V are given in Table 1 of IEC 60038:2009.
NOTE 3 This document does not include electromagnetic compatibility (EMC) requirements.
Lichtbogenschweißeinrichtungen - Teil 1: Schweißstromquellen (IEC 60974-1:2021)
Matériel de soudage à l'arc - Partie 1: Sources de courant de soudage (IEC 60974-1:2021)
IEC 60974-1:2021 est disponible sous forme de IEC 60974-1:2021 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
L’IEC 60974-1:2021 s'applique aux sources de courant de soudage à l'arc et aux procédés connexes conçus pour un usage industriel et professionnel qui sont alimentés sous une tension ne dépassant pas 1 000 V, alimentés par batterie ou entraînés par des moyens mécaniques. Le présent document spécifie les exigences de sécurité et de fonctionnement des sources de courant de soudage et des systèmes de coupage par plasma. Cette sixième édition annule et remplace la cinquième édition parue en 2017 et l'Amendement 1:2019. Elle constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente.
- Ajout du Tableau 1 avec la liste des termes par référence croisée dans l’ordre alphabétique de la langue source.
- Le document de référence des distances d’isolement dans l’air et des lignes de fuite devient IEC 60664-1:2020.
- Modification du 6.1.2 et du 6.1.3 afin de respecter le dimensionnement de l’isolation principale spécifié dans l’IEC 60664-1 pour le réseau d’alimentation avec des tensions rationalisées.
- Déplacement de l’essai de condensateur anormal du 6.2.2 au nouveau 9.5.
- Modification du 6.2.5 du 6.3.6 afin d’utiliser le réseau de mesure du courant de contact pondéré pour une opération de non-lâcher/immobilisation et ajout d’une exigence de tolérance pour la tension d’alimentation.
- Nouvelle structure du 16.3 et nouvelle exigence d’exactitude pour la valeur de tension affichée.
- Modification de l’Annexe A qui devient une annexe normative et ajout du Tableau A.2 et du Tableau A.3.
- Mise à jour rédactionnelle de l’Annexe L pour l'utilisation des symboles normalises.
- Nouvelle rédaction du mesurage du rendement et de la puissance en état au ralenti (Annexe M sur la base de l’IEC 62301:2011).
- Ajout d’un réseau de mesure pondéré pour une opération de non-lâcher/immobilisation (Annexe N).
Oprema za obločno varjenje - 1. del: Viri varilnega toka (IEC 60974-1:2021)
Ta del standarda IEC 60974 se uporablja za vire toka za obločno varjenje in sorodne postopke, namenjene za INDUSTRIJSKO IN PROFESIONALNO UPORABO, ki se napajajo z napetostjo, manjšo od 1000 V, prek AKUMULATORJA ali mehanskih sredstev.
Ta dokument določa zahteve glede varnosti in zmogljivosti za VIRE VARILNEGA TOKA in PLAZEMSKE REZALNE SISTEME.
Ta dokument se ne uporablja za vire toka za obločno varjenje in rezanje za omejeno uporabo, ki so namenjeni predvsem za laično uporabo in so oblikovani v skladu s standardom IEC 60974-6.
Ta dokument vključuje zahteve za akumulatorske VIRE VARILNEGA TOKA in AKUMULATORJE, ki so podane v dodatku O.
Ta dokument se ne uporablja za preskušanje virov toka med periodičnim vzdrževanjem ali po popravilu.
OPOMBA 1: Tipični sorodni postopki so električno obločno rezanje in brizganje.
OPOMBA 2: Sistemi AC z nazivno napetostjo od 100 V do 1000 V so podani v preglednici 1 standarda IEC 60038:2009.
OPOMBA 3: Ta dokument ne vključuje zahtev v zvezi z elektromagnetno združljivostjo (EMC).
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN IEC 60974-1:2023
01-februar-2023
Nadomešča:
SIST EN IEC 60974-1:2018
SIST EN IEC 60974-1:2018/A1:2020
Oprema za obločno varjenje - 1. del: Viri varilnega toka (IEC 60974-1:2021)
Arc welding equipment - Part 1: Welding power sources (IEC 60974-1:2021)
Lichtbogenschweißeinrichtungen - Teil 1: Schweißstromquellen (IEC 60974-1:2021)
Matériel de soudage à l'arc - Partie 1: Sources de courant de soudage (IEC 60974-
1:2021)
Ta slovenski standard je istoveten z: EN IEC 60974-1:2022
ICS:
25.160.30 Varilna oprema Welding equipment
SIST EN IEC 60974-1:2023 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN IEC 60974-1:2023
---------------------- Page: 2 ----------------------
SIST EN IEC 60974-1:2023
EUROPEAN STANDARD EN IEC 60974-1
NORME EUROPÉENNE
EUROPÄISCHE NORM December 2022
ICS 25.160.30 Supersedes EN IEC 60974-1:2018
English Version
Arc welding equipment - Part 1: Welding power sources
(IEC 60974-1:2021)
Matériel de soudage à l'arc - Partie 1: Sources de courant Lichtbogenschweißeinrichtungen - Teil 1:
de soudage Schweißstromquellen
(IEC 60974-1:2021) (IEC 60974-1:2021)
This European Standard was approved by CENELEC on 2022-10-25. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60974-1:2022 E
---------------------- Page: 3 ----------------------
SIST EN IEC 60974-1:2023
EN IEC 60974-1:2022 (E)
European foreword
The text of document 26/724/FDIS, future edition 6 of IEC 60974-1, prepared by IEC/TC 26 "Electric
welding" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
EN IEC 60974-1:2022.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2023-10-25
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2025-10-25
document have to be withdrawn
This document supersedes EN IEC 60974-1:2018 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a Standardization Request given to CENELEC by the
European Commission and the European Free Trade Association, and supports essential
requirements of EU Directive(s) / Regulation(s).
For the relationship with EU Directive(s) / Regulation(s), see informative Annexes ZZA and ZZB, which
are an integral part of EN IEC 60974-1:2022/A11:2022.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60974-1:2021 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 60038:2009 NOTE Harmonized as EN 60038:2011
IEC 60085 NOTE Harmonized as EN 60085
IEC 60204-1 NOTE Harmonized as EN 60204-1
IEC 60309-1 NOTE Harmonized as EN IEC 60309-1
IEC 60335-2-29 NOTE Harmonized as EN 60335-2-29
IEC 60384-14 NOTE Harmonized as EN 60384-14
IEC 60947-3 NOTE Harmonized as EN IEC 60947-3
2
---------------------- Page: 4 ----------------------
SIST EN IEC 60974-1:2023
EN IEC 60974-1:2022 (E)
IEC 60974-3 NOTE Harmonized as EN IEC 60974-3
IEC 60974-4 NOTE Harmonized as EN 60974-4
IEC 60974-6 NOTE Harmonized as EN 60974-6
IEC 60974-9 NOTE Harmonized as EN IEC 60974-9
IEC 60974-12 NOTE Harmonized as EN 60974-12
IEC 60990:2016 NOTE Harmonized as EN 60990:2016 (not modified)
IEC 61000-3-2 NOTE Harmonized as EN IEC 61000-3-2
IEC 61032:1997 NOTE Harmonized as EN 61032:1998 (not modified)
IEC 61558-1 NOTE Harmonized as EN IEC 61558-1
IEC 62281 NOTE Harmonized as EN IEC 62281
IEC 62841-1 NOTE Harmonized as EN 62841-1
ISO 13732-1 NOTE Harmonized as EN ISO 13732-1
3
---------------------- Page: 5 ----------------------
SIST EN IEC 60974-1:2023
---------------------- Page: 6 ----------------------
SIST EN IEC 60974-1:2023
IEC 60974-1
®
Edition 6.0 2021-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Arc welding equipment –
Part 1: Welding power sources
Matériel de soudage à l’arc –
Partie 1: Sources de courant de soudage
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.160.30 ISBN 978-2-8322-9914-2
Warning! Make sure that you obtained this publication from an authorized distributor.
Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 7 ----------------------
SIST EN IEC 60974-1:2023
– 2 – IEC 60974-1:2021 © IEC 2021
CONTENTS
FOREWORD . 7
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 10
3.1 General terms and definitions . 12
3.2 Terms and definitions related to BATTERY SYSTEMs . 21
3.3 Terms and definitions related to efficiency and IDLE STATE power
measurement . 23
4 Environmental conditions . 25
5 Tests . 25
5.1 Test conditions . 25
5.2 Measuring instruments . 25
5.3 Conformity of components . 26
5.4 TYPE TESTs . 27
5.5 ROUTINE TESTs . 27
6 Protection against electric shock . 28
6.1 Insulation . 28
6.2 Protection against electric shock in normal service (direct contact) . 35
6.3 Protection against electric shock in case of a fault condition (indirect contact) . 38
7 Thermal requirements . 40
7.1 Heating test . 40
7.2 Temperature measurement . 41
7.3 Limits of TEMPERATURE RISE . 43
7.4 Loading test . 44
7.5 Commutators and slip-rings . 45
8 THERMAL PROTECTION . 45
8.1 General requirements . 45
8.2 Construction . 45
8.3 Location . 45
8.4 Operating capacity . 46
8.5 Operation . 46
8.6 Resetting . 46
8.7 Indication . 46
9 Abnormal operation . 46
9.1 General requirements . 46
9.2 Stalled fan test . 47
9.3 Short circuit test . 47
9.4 Overload test . 48
9.5 Capacitors short circuit . 48
10 Connection to the supply network . 48
10.1 Supply voltage . 48
10.2 Multi-supply voltage . 49
10.3 Means of connection to the SUPPLY CIRCUIT . 49
10.4 Marking of terminals . 49
10.5 PROTECTIVE CIRCUIT . 50
---------------------- Page: 8 ----------------------
SIST EN IEC 60974-1:2023
IEC 60974-1:2021 © IEC 2021 – 3 –
10.6 Cable anchorage . 51
10.7 Inlet openings . 52
10.8 SUPPLY CIRCUIT on/off switching device . 52
10.9 Supply cables . 53
10.10 Supply coupling device (attachment plug) . 54
11 Output . 54
11.1 RATED NO-LOAD VOLTAGE . 54
11.2 TYPE TEST values of the CONVENTIONAL LOAD VOLTAGE . 57
11.3 Mechanical switching devices used to adjust output . 58
11.4 WELDING CIRCUIT connections . 59
11.5 Power supply to external devices connected to the WELDING CIRCUIT . 60
11.6 Auxiliary power supply . 60
11.7 Welding cables . 60
12 CONTROL CIRCUITs . 61
12.1 General requirement . 61
12.2 Isolation of CONTROL CIRCUITs . 61
12.3 WORKING VOLTAGEs of remote CONTROL CIRCUITs . 61
13 HAZARD REDUCING DEVICE . 61
13.1 General requirements . 61
13.2 Types of HAZARD REDUCING DEVICES . 62
13.3 Requirements for HAZARD REDUCING DEVICEs . 62
14 Mechanical provisions . 63
14.1 General requirements . 63
14.2 Enclosure . 63
14.3 Handling means . 64
14.4 Drop withstand . 64
14.5 Tilting stability . 65
15 RATING PLATE . 65
15.1 General requirements . 65
15.2 Description . 65
15.3 Contents . 66
15.4 Tolerances . 69
15.5 Direction of rotation . 70
16 Adjustment of the output . 70
16.1 Type of adjustment . 70
16.2 Marking of the adjusting device . 70
16.3 Indication of current or voltage control . 71
17 Instructions and markings . 71
17.1 Instructions . 71
17.2 Markings . 72
Annex A (normative) Nominal voltages of supply networks . 73
Annex B (informative) Example of a combined dielectric test . 76
Annex C (normative) Unbalanced load in case of AC tungsten inert-gas WELDING
POWER SOURCES . 77
C.1 General . 77
C.2 Unbalanced load . 78
C.3 Example for an unbalanced load . 78
Annex D (informative) Extrapolation of temperature to time of shutdown . 80
---------------------- Page: 9 ----------------------
SIST EN IEC 60974-1:2023
– 4 – IEC 60974-1:2021 © IEC 2021
Annex E (normative) Construction of SUPPLY CIRCUIT terminals . 81
E.1 Size of terminals . 81
E.2 Connections at the terminals . 81
E.3 Construction of the terminals . 82
E.4 Fixing of the terminals . 82
Annex F (informative) Cross-reference to non-SI units . 83
Annex G (informative) Suitability of supply network for the measurement of the true
RMS value of the supply current . 84
Annex H (informative) Plotting of STATIC CHARACTERISTICS . 85
H.1 General . 85
H.2 Method . 85
H.3 Analysis of the results . 85
Annex I (normative) Test methods for a 10 Nm impact . 86
I.1 Pendulum impact hammer . 86
I.2 Free fall spherical steel weight . 86
Annex J (normative) Thickness of sheet metal for enclosures . 88
Annex K (informative) Examples of RATING PLATES . 90
Annex L (informative) Graphical symbols for arc welding equipment . 97
L.1 General . 97
L.2 Use of symbols . 97
L.3 Symbols . 98
L.4 Examples of combinations of symbols . 116
L.5 Examples of control panels . 118
Annex M (informative) Efficiency and IDLE STATE power measurement . 121
M.1 General conditions for measurement . 121
M.2 Measurements . 122
M.3 Test report . 125
M.4 Test report template . 127
Annex N (normative) TOUCH CURRENT measurement . 129
Annex O (normative) Battery-powered WELDING POWER SOURCES . 135
O.1 General . 135
O.4 Environmental conditions . 136
O.5 Tests . 136
O.6 Protection against electric shock . 138
O.7 Thermal requirements . 140
O.8 THERMAL PROTECTION . 142
O.9 Abnormal operation . 142
O.10 Connection to the supply network . 146
O.14 Mechanical provisions . 148
O.15 RATING PLATE . 149
O.17 Instructions and markings . 151
Bibliography . 153
Figure 1 – Flow chart for conformity methods of 5.3 . 26
Figure 2 – Example of insulation configuration for CLASS I EQUIPMENT . 29
Figure 3 – Measurement of WELDING CIRCUIT TOUCH CURRENT . 37
Figure 4 – Measurement of TOUCH CURRENT in normal condition . 37
---------------------- Page: 10 ----------------------
SIST EN IEC 60974-1:2023
IEC 60974-1:2021 © IEC 2021 – 5 –
Figure 5 – Measurement of RMS values . 56
Figure 6 – Measurement of peak values . 57
Figure 7 – Principle of the RATING PLATE . 66
Figure B.1 – Combined high-voltage transformers . 76
Figure C.1 – Voltage and current during AC tungsten inert-gas welding . 77
Figure C.2 – Unbalanced voltage during AC tungsten inert-gas welding . 78
Figure C.3 – AC WELDING POWER SOURCE with unbalanced load . 79
Figure I.1 – Test set-up . 86
Figure K.1 – Single-phase transformer . 90
Figure K.2 – Three-phase rotating frequency converter . 91
Figure K.3 – Subdivided RATING PLATE: single-/three-phase transformer rectifier . 92
Figure K.4 – Engine-generator-rectifier . 93
Figure K.5 – Single-/three-phase inverter type . 94
Figure K.6 – Battery-powered WELDING POWER SOURCE with INTEGRAL BATTERY . 95
Figure K.7 – Battery-powered WELDING POWER SOURCE with detachable / separable
BATTERY . 96
Figure L.1 – Input voltage power switch . 118
Figure L.2 – Arc force control potentiometer . 118
Figure L.3 – Remote receptacle and selector switches . 118
Figure L.4 – Terminals with inductance selector for MIG/MAG welding. 119
Figure L.5 – Process switch (MMA, TIG, MIG) . 119
Figure L.6 – Selector switch on AC/DC equipment . 119
Figure L.7 – Panel indicator lights (overheat, fault, arc striking, output voltage) . 119
Figure L.8 – Setting pulsing parameters using digital display . 120
Figure M.1 – Measurement procedure . 125
Figure N.1 – Measuring network, TOUCH CURRENT weighted for perception or
startle-reaction . 129
Figure N.2 – Measuring network, TOUCH CURRENT weighted for letgo-immobilization . 130
Figure N.3 – Diagram for TOUCH CURRENT measurement on fault condition at operating
temperature for single-phase connection of appliances other than those of CLASS II . 132
Figure N.4 – Diagram for TOUCH CURRENT measurement on fault condition for three-
phase four-wire system connection of appliances other than those of CLASS II . 134
Figure O.1 – Marking of BATTERY VOLTAGE CLASS B electric components . 152
Table 1 – Alphabetical list of terms . 11
Table 2 – Minimum CLEARANCES for overvoltage category III . 30
Table 3 – Minimum CREEPAGE DISTANCES . 32
Table 4 – Insulation resistance . 33
Table 5 – Dielectric test voltages . 34
Table 6 – Minimum distance through insulation . 38
Table 7 – Temperature limits for windings, commutators and slip-rings . 43
Table 8 – Temperature limits for external surfaces . 44
Table 9 – Cross-section of the output short-circuit conductor . 47
Table 10 – Current and time requirements for PROTECTIVE CIRCUITS . 50
---------------------- Page: 11 ----------------------
SIST EN IEC 60974-1:2023
– 6 – IEC 60974-1:2021 © IEC 2021
Table 11 – Minimum cross-sectional area of the external protective copper conductor . 51
Table 12 – Verification of continuity of the PROTECTIVE CIRCUIT . 51
Table 13 – Pull. 52
Table 14 – Summary of allowable RATED NO-LOAD VOLTAGES . 56
Table 15 – HAZARD REDUCING DEVICE requirements . 62
Table A.1 – Nominal voltages for supply networks with protective overvoltage control . 73
Table A.2 – Single-phase three-wire or two-wire AC or DC systems . 74
Table A.3 – Three-phase four-wire or three-wire AC systems . 75
Table E.1 – Range of conductor dimensions to be accepted by the SUPPLY CIRCUIT
terminals .
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.